Improvement in carriage-shafts



J. A. J. SAWYER.

CARRIAGE-SHAFTS.

No. 189,657. Patented April 17, 1877.

Fig.1.

7717A? af'a'r 4% N. PETERS, PHOTWUYHDGRAPHER, WASHINGTUN, D C.

UNITED STATES PATENT QFFICE.

JOHN A. J. SAWYER, OF LYNN, MASSACHUSETTS.

IMPROVEMENT IN CARRIAGE-SHAFTS.

Specification forming part of Letters Patent N 0. 189,657, dated April17, 1877 application filed March 13, 1877.

To all whom it may concern:

Be it known that I, JOHN A. J. SAWYER,

with my invention.

In making carriage-shafts it is customary to first steam the wood, andwhile it is in such condition to bend it into shape. A shaft sov made isvery liable in course of use to straighten more or less at the bentparts. One object of my invention is to prevent this, another being togreatly strengthen the shaft in the portion which is to project beyondthe tug of the saddle of the harness.

In carrying out my invention I insert within the wooden shaft Alengthwise of it from its lesser end a strip, B, of metal, it beingextended throughout the curved part, which it may be desirable tostrengthen. This strip I secure in place by a series of rivets, a a,going through it and the shaft. Furthermore, the strip or re-enforoe isprovided with short flanges b b, arranged to project from it atintervals, and at its upper and lower edges, or

they may be continued from end to end of it. In the drawings theseflanges are shown as arranged over rivets, such an arrangement servingto there strengthen the shaft when weakened by the rivet-holes.

The strip or re-enforce extends lengthwise within the thimble or'ferruleO, and thereby serves to prevent such from being broken off the shaft bya horse stepping on the shaft or the ferrule. The re-enforce alsoprevents the shaft from being broken when stepped on by a horse as it isvery liable to be when without the re enforce.

I do not claim a whiffletree or evener-bar, having a metal platearranged lengthwise within it, or between its layers of wood.

What I claim is 1. The combination of a wooden carriageshaft, A, and ametallic strip or re-enforce, B, arranged therein, and fastened thereto,and provided with flanges, as set forth.

2. The combination of a wooden carriageshaft, A, and its metallicthimble or ferrule C, with a metallic strip or re-enforce, B, providedwith flanges, and arranged within such shaft and thimble, and fastenedto the shaft by .rivets, all substantially as specified.

JOHN A. J. SAWYER. Witnesses:

R. H. EDDY, J. R. SNow.

